利用OTN/PTN技术规划内蒙古城域传输网络

在简要介绍OTN/PTN技术特性及其在传送网中的承载关系基础上,详细阐述了利用OTN/PTN技术规划城域传输网的基本思路,并以呼和浩特城域网为案例,简要阐述了利用OTN/PTN技术组建核心网及汇聚网的有关事宜。     

基于光通信技术的传输网演进分析

针对传输网发展过程出现的基于光通信技术的SDH(同步数字系列)、WDM(波分复用网络)和OTN(光传送网),文章对比研究它们的帧结构、功能分层以及整体传输系统,指出SDH基于其完善的帧结构在管理维护上的优势,WDM(波分复用网络)具有大容量的特点,但是只有OTN在整体结构上集成电层、光层的两者优势,容量大并且管理功能强,是基于光通信技术的传输网的发展方向。     

OTN技术在传统波分中的应用

简要介绍了光传送网（OTN）技术相对于传统波分系统的优点,并结合骨干传输网工程的建设对OTN电交叉在传统波分系统中的应用进行了论证。     

OTN技术在长途传输网中的应用

OTN(光传送网,Optical Transport Network)是以波分复用技术为基础,在光层组织网络的传送网,是下一代的骨干传送网。文章主要分析长途传输网的现状与发展趋势,OTN在长途传输网中的应用等内容。     

光传送网(OTN)技术特点及分析

光传送网(OTN)的技术原理、传统传送网的技术缺陷、光传送网(OTN)的技术特点、光传送网(OTN)的技术发展前景。     

干线传输网演进趋势探讨

简要介绍当前网络数据流量发展情况及对传送网的影响,介绍近期波分市场的发展状况。简单分析和描述100G的关键技术及超100G的发展情况,根据OTN(光传送网)的特性对其在干线传输网中的应用优势进行详细分析。最后介绍在干线传输网应用低损耗光纤实现超长距传输。     

浅析OTN技术在新疆电力传送网中的发展趋势

首先介绍OTN（OpticalTransportNetwork ,光传送网）的概念以及新疆电网当前的传输网现状,分析在新疆的地理环境中如何更好的选择传送承载方式,提出了基于OTN的智能光网络将在新疆电力传送网中有非常广阔的发展     

基于OTN技术的空管干线传输网络设计与应用

为满足成都天府国际机场运行需要,实现西南空管局成都“两场四地”各类空管业务的底层传输需求,设计并构建基于OTN技术的“两场四地”互联超高速光传送网络。以成都两场四地OTN光传送网为例,结合西南空管成都两场四地之间的业务需求、空管业务传输保障的特殊要求,阐述了OTN网络的基本特性、成都两场四地OTN光传送网的组网结构、业务Qos保护体系、业务接入情况,并对日常运维保障情况进行总结分析。成都两场四地OTN光传送网采用了基于波分复用的独立双环网组网结构,针对空管不同等级的业务应用不同的Qos保护体系,在成都两场四地空管业务信息交互中起到了底层干线传输作用,是成都两场四地业务稳定传送交互的基石,该网络的设计、建设思路及运维经验可为其它空管干线传输网络建设提供借鉴。     

下一代光通信网的演进

介绍了光通信网及其相关的光传输网和光接入网技术的发展,指出了下一代光通信网的演进方向:光传送网(OTN)、自动交换光网络(ASON)、全光网络、无源光网络(PON)和家庭网络.     

100G OTN在城域传送网中的应用探讨

本文首先介绍了OTN的概念,OTN的关键技术以及主要优势。文中指出,基于OTN的智能光网络将为大颗粒宽带业务的传送提供非常理想的解决方案。随后,本文在简要介绍城域传送网典型网络架构后,重点分析阐述了如何在城域传送网核心层和汇聚层中应用100G OTN进行组网,并提出了若干具有实用价值的工程建议。     

WDM field trials of 43-Gb/s/channel transport system for optical transport network

This paper describes recent technical challenges and the progress toward the realization of the optical transport network (OTN) based on 43 Gb/s channel. We describe the new digital frame format "OTU3: Optical Channel Transport Unit 3," which is standardized in ITU-T for OTN, for the enhancement of the network management capability in the OTN based on 43-Gb/s channels. We first proposed 43-Gb/s/ch dense wavelength-division multiplexing (DWDM) dispersion-managed transmission system using carrier-suppressed return-to-zero (CS-RZ) format that has several attractive features; it advances the evolution of OTN into 100 GHz-spaced long-haul DWDM transport networks. The first wavelength-division multiplexing (WDM) field trials confirmed the superiority of CS-RZ format in the DWDM transmission performance for the first time. The first 1 Tb/s (25 /spl times/ 43 Gb/s) WDM field trial confirmed the excellent network management capability of OTU3 in future data-centric OTN using the newly developed 43-Gb/s OTN line-terminal prototype.     

40-Gbit/s ETDM Channel Technologies for Optical Transport Network

We review recent progress and the future of 40-Gbit/s electrical time division multiplexed (ETDM) channel technologies for the optical transport network (OTN), where optical technologies, including high-speed ETDM channel transmission and wavelength division multiplexing (WDM), dramatically enhance network flexibility while reducing transport node cost as well as transmission cost. The 40 Gbit/s channel has recently been specified to be one of the optical channels in OTN. A new digital frame for the optical channels [optical channel transport unit (OTU)] was introduced for the network node interface of OTN in International Telecommunication Union-Telecommunication (ITU-T) standard. The specified data bit rates are 2.7 Gbit/s (OTU1), 10.7 Gbit/s (OTU2), and 43.0 Gbit/s (OTU3). These OTU frames have additional overhead bytes that support the network management overhead for OTN and out-of-band forward error correcting (FEC) codes. We discuss the feasibility and impact of the OTU3 frame in terrestrial networks. A newly developed 43-Gbit/s OTN line terminal prototype that confirms the feasibility of 43-Gbit/s ETDM channels and the OTU3 management capability is discussed. As a guide to the evolution of OTN, modulation formats for 43Gbit/s-based DWDM transmission are described for long distance application with the total capacity over one terabit per second.     

基于光交叉的OTN网络建设模式探讨

随着OTN光交叉技术的成熟完善及应用成本的降低,特别是10Gbit/s、40Gbit/s等大颗粒业务的逐渐增多,OTN光交叉组网将得到逐渐广泛应用。通过对OTN光交叉技术的对比分析,文章总结了OTN光交叉的几张组网模型及适合的应用场景,并以黑龙江移动省内二级干线网络为例,说明一张OTN网络由电交叉向光交叉演进的一种方式。     

G.654.E光纤承载超100Gbit/s OTN系统应用分析

针对G.654.E光纤即将商用于超100 Gbit/s OTN系统而无相应规范标准的问题,本文首先利用香农定理和光信噪比公式理论分析传输速率的受制因素,接着分析OTN系统的最大光放段损耗值中的中继段损耗、活接头损耗和色散补偿光纤插损,然后推算出G.654.E光纤承载超100 Gbit/s OTN系统中不同传输速率下的复用段距离,并与实际测试值进行对比分析,最后结合骨干网络现状情况,提出G.654.E光纤承载超100 Gbit/s OTN技术应用建议。     

Evolution of Terrestrial Optical System and Core Network Architecture

Optical systems and technologies have been radically changing the telecommunication networks for past 15 years; today wavelength division multiplexing (WDM) technology, optical amplifiers, and simple optical switching elements like optical add-drop multiplexers (OADMs) are used in the backbone networks of all operators worldwide. Optical systems nowadays provide the basis for cost-effective transmission of large amounts of bandwidth over the Internet, and will enable its future growth and the spreading of new applications and services. This paper summarizes the main trends in optical networking and investigates potential future application areas. Optical system technology has become so pervasive in network design that it needs to be considered in the context of provisioning new applications and services. Therefore, the analysis is not limited to the aspects of physical transmission, but also takes into account recent developments in integrated network design as well as network control and management. The following sections describe the key functionalities of future optical network architectures, and the key findings of the theoretical analysis are supported by the results of a field trial of advanced transmission technology.     

吐哈油田融合网络规划与设计探讨

根据吐哈油田光传送网络的实际情况和建设智能油田的需要,通过对OTN技术和Ethernet技术的比较分析,提出DWDM+Ethernet比OTN技术更适合以IP数据业务和应用为主的网络,是吐哈油田下一代融合网络的最佳选择。给出了实际设计方案,方案采用了先进的前向纠错(FEC)技术解决现有光缆路由中存在的超长跨距和超大光衰耗导致的光信噪比(OSNR)低于网络技术指标要求的技术难题。     

Design of a 43-Gb/s line terminal based on optical transport network system architecture

The optical transport network (OTN) based on 43-Gb/s channels is expected to be the carriers' next-generation core network. This paper discusses its system architecture, from the requirements of services, protection, and management, and shows a feasible scenario to ensure the rapid penetration of the 43-Gb/s-based OTN. It also describes the design concept and functions of the first 43-Gb/s OTN line terminal. The line terminal deploys time-division multiplexing to handle client signals and provides high-quality, multiple transparent services, such as synchronous optical network/synchronous digital hierarchy and gigabit Ethernet. The configuration and features of the actual fabricated system are described.     

光传送网的故障管理

用分层方法讨论了光传送网络的告警管理功能,着重分析了全光网络中缺陷指示信号的起源、传输与终结问题,此外还对光监控信道的故障情况的处理方法进行了讨论。     

OTN技术在城域光网络中的应用分析

从城域光网络的概念、业务类型入手,对城域光网络现有技术做了简介,阐述了城域光网络现有技术的不足,并对光传送网（OTN）技术的特点及其在城域光网络中的应用做了一定分析。     

网络融合环境下OTN的组网方式

在三网融合形势下,多媒体业务与数据传输需求不断增加,对传统骨干传输网络提出更高的要求。传统的基于WDM、SHD技术的光纤通信网络虽可满足传输容量需求,但存在成本较高、扩展和调度能力差、业务多样化能力弱等问题,不能进行有效的组网,难以满足未来发展的需要,因此选用新一代的OTN技术进行组网成为发展的必然趋势。通过相关资料研究,结合工作实践经验,对OTN技术的特点、OTN在光通信网络中的组网方式进行总结分析,以期促进OTN技术的应用与发展。